Early chemistry concerned with the search for the philosopher"s stone, a substance believed to turn base metals into gold. Also the quest for eternal life, by the use of alchemical and human transmutation. The art of alchemy can be traced back to 100-150 B.C. in China, before the practice of rejuvination and eternal life appeared in the west. The great Wei Po-Yang (100-50 A.D.), is said to have discovered "true gold medicine". (See Transubstantiation. See "The History of Magic and the Occult", Seligmann, Gramercy, 1997. pg. 95. See also; "The Steinerbooks Dictionary of the Psychic, Mystic, and Occult", Rudolf Steiner, 1973. pg. 15.)